Acdelco GM Genuine Parts 12679100 Exhaust Variable Valve Timing Solenoid is a vital component designed to optimize engine performance by regulating the timing of the exhaust valves. This solenoid is engineered for both on-road and off-road use, ensuring reliable operation in all weather conditions. Coated to protect against premature corrosion, enhancing durability. Designed to match oem specifications for expected performance. Suitable for a wide range of chevrolet, buick, gmc and cadillac vehicles. Includes solenoid, seal, retainer and bolt for straightforward installation.